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firmware: add routing table (WIP)

This commit is contained in:
Sebastien Bourdeauducq 2018-09-09 21:49:28 +08:00
parent 496d1b08fd
commit 7ae44f3417
4 changed files with 67 additions and 6 deletions

View File

@ -0,0 +1,59 @@
use board_misoc::{csr, config};
pub const DEST_COUNT: usize = 256;
pub const MAX_HOPS: usize = 32;
pub const INVALID_HOP: u8 = 0xff;
pub struct RoutingTable([[u8; MAX_HOPS]; DEST_COUNT]);
impl RoutingTable {
// default routing table is for star topology with no hops
fn default_master() -> RoutingTable {
let mut ret = RoutingTable([[INVALID_HOP; MAX_HOPS]; DEST_COUNT]);
for i in 0..csr::DRTIO.len() {
ret.0[i][0] = i as u8;
}
for i in 1..csr::DRTIO.len() {
ret.0[i][1] = 0x00;
}
ret
}
// satellites receive the routing table from the master
// by default, block everything
fn default_satellite() -> RoutingTable {
RoutingTable([[INVALID_HOP; MAX_HOPS]; DEST_COUNT])
}
}
pub fn config_routing_table() -> RoutingTable {
let mut ret = RoutingTable::default_master();
let ok = config::read("routing_table", |result| {
if let Ok(data) = result {
if data.len() == DEST_COUNT*MAX_HOPS {
for i in 0..DEST_COUNT {
for j in 0..MAX_HOPS {
ret.0[i][j] = data[i*MAX_HOPS+j];
}
}
return true;
}
}
false
});
if !ok {
warn!("could not read routing table from configuration, using default");
}
ret
}
pub fn program_interconnect(rt: &RoutingTable, rank: u8)
{
for i in 0..DEST_COUNT {
let hop = rt.0[i][rank as usize];
unsafe {
csr::cri_con::routing_destination_write(i as _);
csr::cri_con::routing_hop_write(hop);
}
}
}

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@ -48,3 +48,5 @@ pub mod grabber;
#[cfg(has_drtio)]
pub mod drtioaux;
#[cfg(has_drtio_routing)]
pub mod drtio_routing;

View File

@ -26,19 +26,19 @@ def get_argparser():
return parser
ENTRY_COUNT = 256
DEST_COUNT = 256
MAX_HOPS = 32
def init(filename):
with open(filename, "wb") as f:
f.write(b"\xff"*(ENTRY_COUNT*MAX_HOPS))
f.write(b"\xff"*(DEST_COUNT*MAX_HOPS))
def show_routes(filename):
routes = []
with open(filename, "rb") as f:
for i in range(ENTRY_COUNT):
for i in range(DEST_COUNT):
hops = [int.from_bytes(f.read(1), "big") for j in range(MAX_HOPS)]
routes.append(hops)
@ -54,8 +54,8 @@ def show_routes(filename):
def set_route(filename, destination, hops):
with open(filename, "r+b") as f:
if destination >= ENTRY_COUNT:
raise ValueError("destination must be less than {}".format(ENTRY_COUNT))
if destination >= DEST_COUNT:
raise ValueError("destination must be less than {}".format(DEST_COUNT))
f.seek(destination*MAX_HOPS)
if len(hops) + 1 >= MAX_HOPS:

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@ -854,9 +854,9 @@ class _SatelliteBase(BaseSoC):
coreaux.bus)
self.add_memory_region(memory_name, memory_address | self.shadow_base, 0x800)
self.config["HAS_DRTIO"] = None
self.config["HAS_DRTIO_ROUTING"] = None
self.add_csr_group("drtioaux", drtioaux_csr_group)
self.add_memory_group("drtioaux_mem", drtioaux_memory_group)
self.config["HAS_DRTIOREP"] = None
self.add_csr_group("drtiorep", drtiorep_csr_group)
self.config["RTIO_FREQUENCY"] = str(rtio_clk_freq/1e6)